This commit upgrades ksh93 to the latest version. Some minor changes
were required in the dtkcmds.c to make this work.
Most of the changes were in Makefile.am - primarily ensuring that
SHOPTS_* defines matched between dtksh and ksh93 builds, and that
ksh93 was actually told about them :)
The SHOPTS_* defines need to be assigned as the integer 1 as well, or
various preprocessor checks in ksh93 would fail.
Also:
- got rid of SUIDEXECDEFINES - this is a holdover from the Imake days
and was never defined anyway.
- removed some SHOPT_* defines that no longer existed.
- do not pass CFLAGS to the ksh build at all - no need to complicate
things.
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